Is it possible to move the view with holding spacebar?
In Blender 2.79 (and maybe 2.8, but I haven't seen that) go to File/User Settings, click on the Input tab at the top, and there you have the different areas with their commands and hotkeys.  At the top is a field where "Name" is written - click on that and change it to "key binding" then you can type in the known hotkey in the Search field, (where there's a magnifying glass) to find the command you want, and then you can change it..  I typed "shift" and "middle" and before I typed "mouse button" the command was shown underneath with the hotkeys next to it - you can click on "mouse" and change it to keyboard, then in the field beside it and press on the spacebar

Edit -  I just reread your question and you want it to be Spacebar plus Mouse - so try clicking around and finding out what your options are - that's the place to do it anyway.